Whirlpool APARTMENT MAINTENANCE SERIES, Service Manual

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The electronic control looks at the input from the moisture sensor to see if the clothes are wet or dry.
The moisture sensor will show continuity (short) if the clothes are wet and show NO continuity (open)
if the clothes are dry.
If the clothes are wet, the Triac on the electronic control board will block power to the timer motor, and
the timer motor will not advance.
If the clothes are dry or there are no clothes in the dryer the Triac on the electronic control board will
allow power to flow to the timer motor causing it to advance.
During the last 10 minutes of the Regular Cycle, (the last 15 minutes of the Permanent Press Cycle)
and any Timed Dry Cycle, Timer Switch 0 will be closed. This will allow the timer motor to advance
regardless of the condition at the moisture sensor. Timer Switch 0 bypasses the electronic control.
(Fig. 4-3)
T/W T/W
W/BK
Heated Air Circulation
Room temperature air (shown as white arrows in
Fig. 4-4) enters the lower portion of the dryer cabi-
net underneath the toe panel and is drawn through
the heating system (electric heating element or
gas burner assembly).
Heated air (shown as dark grey arrows in
Fig. 4-4) is then drawn up the heat duct mounted
to the rear bulkhead and into the dryer drum.
As the heated air circulates in the drum it picks
up moisture (shown by the lighter grey arrows in
Fig. 4-4).
Moisture ladened air it then drawn down through
the lint filter, through the blower and out through
the exhaust duct to be vented out of the dryer.
Venting can be accomplished straight through the
back of the dryer, through either side of the dryer
or down through the bottom of the dryer.
(Fig. 4-4)
Fig. 4-4
Fig. 4-3